CAVE Virtual Object Control for Multi-User Occlusion
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Solution Overview
Problem
Conventional CAVE systems fail to adequately address the occlusion of virtual objects by real objects when multiple users are experiencing the system, leading to reduced information sharing and immersion due to the occlusion of virtual objects by real objects.
Innovation Solution
An information processing device that acquires position information of multiple users and controls the form change of virtual objects based on their positions and attributes, outputting stereoscopic images to mitigate occlusion by moving or altering the display form of virtual objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple users experience the CAVE system simultaneously, then information sharing and immersion are improved, but virtual objects are occluded by real objects reducing visibility
Solution Approach 1:
The patent changes the display dimension from fixed 2D projection to dynamic 3D spatial positioning. Virtual objects are rendered at different depths and positions in three-dimensional space, allowing them to appear in front of occluding real objects. The system calculates optimal 3D positions based on user locations and occlusion detection, enabling virtual objects to be displayed in spatial dimensions that avoid real-world obstructions.
Solution Approach 2:
The patent implements dynamic adjustment of virtual object positions and display parameters based on real-time user locations and occlusion conditions. The system continuously monitors user positions, detects occlusion situations, and dynamically repositions virtual objects or adjusts their display characteristics (such as transparency or size) to maintain visibility. This dynamic adaptation allows the system to respond to changing spatial relationships between users and virtual objects.
2Device complexity
If virtual objects are displayed at fixed positions, then rendering complexity is reduced, but visibility is compromised when users move or real objects occlude
Solution Approach 1:
The patent performs preliminary occlusion detection and position calculation before rendering virtual objects. The system detects potential occlusion situations in advance by analyzing user positions and real object locations, then pre-calculates optimal display positions and parameters. This preliminary action ensures that virtual objects are rendered with appropriate positions and characteristics before visibility issues arise, maintaining reliability without requiring complex real-time adjustments during rendering.
3Object-affected harmful factors
If the system adjusts virtual object positions dynamically, then occlusion is reduced, but processing requirements and system complexity increase
Solution Approach 1:
The patent applies local quality adjustment by modifying only the specific properties of virtual objects affected by occlusion rather than redesigning the entire system. When occlusion is detected, the system locally adjusts parameters such as position, transparency, or size of the affected virtual objects while leaving other elements unchanged. This targeted approach reduces occlusion effectively while minimizing the increase in system complexity.
Data Source
AI summary
The present disclosure relates to an information processing device, an information processing method, and a recording medium that are capable of reducing adverse effects caused by a real object occluding a virtual object.Provided is an information processing device including: a position information acquisition unit that acquires first position information indicating a position of a first user and second position information indicating a position of a second user; a control unit that controls, based on a corresponding position in a real space of a virtual object viewed by the first user and the position indicated by the second position information, a form change of the virtual object; and an image output unit that outputs a stereoscopic image to be displayed to the first user and the second user based on the form change of the virtual object. The present disclosure can be applied, for example, to a device that constitutes a CAVE system.